Does the Daihatsu Sirion fail the MOT on lamps, reflectors and electrics more than it should?
The Daihatsu Sirion records 20.91 lamps, reflectors and electrics failure items per 100 initial MOT tests (2019–2024), against 33.49 expected for a car of the same age mix: less than expected for its class and age (−12.58, 95% interval −13.11 to −12.05). It ranks 649 of 729 models on lamps, reflectors and electrics (1 = most failures above expected).
Data release dvsa-2024-v2 (24 Sep 2026) · page updated 30 Sep 2026 · all models on lamps, reflectors and electrics · check a Daihatsu Sirion by registration
What exactly fails on lamps, reflectors and electrics?
The most frequent DVSA defect wording in this group on the Daihatsu Sirion is “Headlamp reflector or lens slightly defective”, recorded 2,755 times in 2019–2024.
| DVSA defect wording | Items | Per 100 tests |
|---|---|---|
| Headlamp reflector or lens slightly defective | 2,755 | 5.92 |
| The aim of a headlamp is not within limits laid down in the requirements | 1,420 | 3.05 |
| Stop lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning | 1,014 | 2.18 |
| A lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning | 896 | 1.93 |
| A rear registration plate lamp or light source missing or inoperative in the case of multiple lamps or light sources | 859 | 1.85 |
Source: DVSA MOT bulk data (OGL v3.0) · Window: 2019–2024 · n = 46,528 (initial tests) · Method: failure items (major and minor) grouped by DVSA's defect tree; wordings with 30+ items · Updated: 30 Sep 2026 · Release: dvsa-2024-v2 · CSV
If a Daihatsu Sirion gets a lamps, reflectors and electrics advisory, how often does it fail next time?
24.4% of Daihatsu Sirion MOTs with a lamps, reflectors and electrics advisory were followed by a fail in the same group at the next MOT, typically 12.1 months and 3,895 miles later (1,768 advisories followed).
Source: DVSA MOT bulk data (OGL v3.0) · Window: 2019–2024 · n = 1,768 (advisories followed) · Method: the same vehicles followed to their next ordinary MOT · Updated: 30 Sep 2026 · Release: dvsa-2024-v2 · CSV
Other pages for this model
Daihatsu Sirion 2001 · Daihatsu Sirion 2002 · Daihatsu Sirion 2003 · Daihatsu Sirion 2004 · Daihatsu Sirion 2005 · Daihatsu Sirion 2006 · Daihatsu Sirion 2007 · Daihatsu Sirion 2008 · Daihatsu Sirion 2009 · Daihatsu Sirion 2010 · Daihatsu Sirion in the Netherlands · Daihatsu Sirion by postcode area · Daihatsu Sirion body, chassis and structure failures · Daihatsu Sirion brakes failures · Daihatsu Sirion vehicle identification failures · Daihatsu Sirion noise, emissions and leaks failures · Daihatsu Sirion seat belts and airbags failures · Daihatsu Sirion steering failures · Daihatsu Sirion suspension failures · Daihatsu Sirion tyres failures · Daihatsu Sirion visibility failures